Ported extension for a gun muzzle



FIG. 1 is a perspective view of a ported extension for a gun muzzle showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a rotated side view thereof; and,

FIG. 4 is a cross-sectional view of FIG. 3. 

CLAIM The ornamental design for a ported extension for a gun muzzle, as shown and described. 